The Anti-Slip open end helps prevent the open end of wrench from slipping off the fastener The corner of the fastener is locked in the head by the groove As soon as torque is applied to the fastener, the head locks on making it virtually impossible for the head to slip Arched inner profile creates larger contact areas help to prolong life of fasteners Helps increase productivity and efficiency Less risk of knuckle injury from wrench slippage Less damage and rounding to fasteners Spring prevents box end from going through or slipping off the fastener, however the innovative design allows wrench to go through the nut for having access to a second nut if required 15 degree raised offset angle gives ultimate access for reaching recessed or closely spaced fasteners Better comfort with less hand stress Higher strength for increased safety Allows user to apply more torque Same design as the Facom 440 range Easy to keep clean Prevents corrosion Specifications: Size [mm] - 10 Spanner Head Width [mm] - 22.7 Ratchet Head Width [mm] - 20.2 Handle Width [mm] - 10.4 Spanner Head Thickness [mm] - 5.1 Ratchet Head Thickness [mm] - 7.3 Handle Thickness [mm] - 3.4 Overall Length [mm] - 158